WO2000041752A1 - Vorrichtung zur dosierten verabreichung eines injizierbaren produktes - Google Patents
Vorrichtung zur dosierten verabreichung eines injizierbaren produktes Download PDFInfo
- Publication number
- WO2000041752A1 WO2000041752A1 PCT/CH2000/000016 CH0000016W WO0041752A1 WO 2000041752 A1 WO2000041752 A1 WO 2000041752A1 CH 0000016 W CH0000016 W CH 0000016W WO 0041752 A1 WO0041752 A1 WO 0041752A1
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- WIPO (PCT)
- Prior art keywords
- rack
- teeth
- tooth
- row
- locking means
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
- A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
- A61M5/3158—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod performed by axially moving actuator operated by user, e.g. an injection button
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
- A61M5/31553—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe without axial movement of dose setting member
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/31556—Accuracy improving means
- A61M5/31558—Accuracy improving means using scaling up or down transmissions, e.g. gearbox
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/31561—Mechanically operated dose setting member using freely adjustable volume steps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31533—Dosing mechanisms, i.e. setting a dose
- A61M5/31545—Setting modes for dosing
- A61M5/31548—Mechanically operated dose setting member
- A61M5/31563—Mechanically operated dose setting member interacting with a displaceable stop member
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/31566—Means improving security or handling thereof
- A61M5/31573—Accuracy improving means
- A61M5/31575—Accuracy improving means using scaling up or down transmissions, e.g. gearbox
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
- A61M5/3159—Dose expelling manners
- A61M5/31593—Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
- A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
Definitions
- the invention relates to a device for the metered administration of an injectable product.
- a device as the invention relates to it is known for example from WO 97/36626.
- the device has a housing with a reservoir for the product.
- a piston is accommodated in the reservoir, which piston displaces product from the reservoir upon displacement in a feed direction towards an outlet of the reservoir.
- a rack that presses against the piston pushes the piston in the feed direction.
- the rack is provided with rows of teeth.
- a drive member is also slidably received in and against the feed direction relative to the housing, which drives the rack when it is moved in the feed direction. For this purpose, the drive member engages with the teeth in the tooth rows of the rack. When moving, only one of the drivers always presses against a tooth back of a row of teeth.
- the drive member is manually retracted in a forward position by a set dose path length against the direction of advance.
- the drivers of the drive member slide over the teeth of the rows of teeth and give way elastically.
- a shifting back of the rack is prevented by locking means that are accommodated in a manner displaceable relative to the housing.
- the locking means cooperate with one of the tooth rows of the toothed rack in such a way that the locking means prevent displacement of the toothed rack against the feed direction and allow displacement of the toothed rack in the feed direction by elastic yielding.
- the locking means do not simultaneously engage with the deepest tooth engagement in tooth gaps in the rows of teeth.
- the alternating intervention during a shift in the direction of advance which is advantageous in terms of accuracy and in particular the safety during dosing and administration, means that after a long period of storage, which in the factory is usually several months until the first use, due to material fatigue one in the storage state bent away blocking means or driver this advantage is lost again or does not come into play at all.
- the invention has set itself the task of ensuring with such a device for the dosing administration of an injectable product, even after a long period of storage, the exact dosing and administration of the product with greater certainty.
- a device for the metered administration of an injectable product comprises a housing with a reservoir for the product, a piston which, when displaced in a feed direction, displaces an outlet of the reservoir to product from the reservoir, a rack with a first displacing the piston in the feed direction Row of teeth and a second row of teeth, a drive member which can be displaced in and against the feed direction relative to the housing and which, when displaced in the feed direction, entrains the toothed rack, and a locking means which is arranged so as to be displaceable relative to the housing and which interacts with one of the rows of teeth in such a way that there is a displacement prevents the rack against the feed direction and allows the rack to move in the feed direction.
- At least two locking means are preferably provided which, when the rack is displaced, do not simultaneously engage with deep engagement in tooth gaps in the rows of teeth. Only one of the locking means always engages in a tooth gap, while the other is elastically pressed against a tooth flank transversely to the feed direction.
- At least one of the at least two tooth rows of the toothed rack has an elongated tooth gap into which that which interacts with this tooth row Locking means engages when the rack assumes a starting position before a first administration.
- the starting position takes the drive member and the rack relative to each other after assembly until a first administration.
- each of at least two locking means engages in a tooth gap. The fatigue of the blocking agent is prevented while maintaining the alternating procedure that is advantageous for administration.
- At least two drivers are connected to the drive member so that they can move, each of which cooperates with one of the rows of teeth, such that when the drive member is moved in the feed direction, only one of the at least two drivers presses against a tooth of the rack in the feed direction, while the other resiliently presses against one tooth Tooth flank gives way.
- the drivers allow a displacement of the drive member against the feed direction and relative to the rack by elastic yielding.
- At least one of the at least two tooth rows of the toothed rack has an elongated tooth gap into which the driver interacting with this tooth row engages when the toothed rack assumes the aforementioned starting position before a first administration. This prevents the driver from fatigue.
- An elongated tooth gap is understood to mean a tooth gap which, viewed in the feed direction, is longer than the regularly formed further tooth gaps of a row of teeth, which are referred to below as regular tooth gaps.
- a locking means or driver can preferably engage in the extended area in a longer area than in the case of regular tooth gaps as far as the locking means engages in a regular tooth gap in the locking position or the driver in the stop position.
- the intervention is deeper than it would be if the locking means or the driver in the starting position were opposite a regular tooth gap.
- the deepest intervention is accordingly an intervention when a locking means or driver protrudes into a tooth base or when a locking means or driver protrudes as far as the rack as in a locking position or stop position.
- both an extended tooth gap for at least one of at least two locking means and an extended tooth gap for at least one of at least two drivers are formed for the starting position in the at least two rows of teeth.
- the extended tooth gap for the locking means and the extended tooth gap for the driver can be formed in a single row of teeth. However, it is also possible to form one elongated tooth gap in one row of teeth and the other elongated tooth gap in the other row of teeth.
- the rows of teeth on the rack are preferably sawtooth-shaped with teeth that taper in the direction of feed.
- the shape of the locking means and the driver (s) are adapted so that pushing away when the rack is displaced in the feed direction is made as difficult as possible by friction and a displacement against the feed direction is reliably blocked by a purely positive engagement.
- the rows of teeth can also have a different shape, as long as the two requirements of being displaceable in the feed direction and reliably preventing displacement against the feed direction are met.
- the rows of teeth on the rack are preferably formed opposite one another or also next to one another; in principle, however, they could be provided in any areas of the rack with a corresponding height offset of the locking means and / or the drivers.
- the drivers are preferably arranged at the same height and the alternating engagement is achieved by displacing the rows of teeth by a fraction of a tooth pitch.
- the locking means are also preferably arranged at the same height with one another.
- the drivers work in the same way in fulfilling their respective function, in that they lie against a toothed rack of the toothed rack and thereby cause the toothed wheel to be carried or locked and allow the toothed rack to be pushed back or pushed forward by elastic yielding.
- They can have the same or different designs.
- the elastic yield is preferably achieved by bending a tongue extending in the direction of displacement transversely to the direction of displacement of the rack. Basically it would also be, for example possible to store a cam so that it can be moved against elastic restoring forces.
- the toothed rack is equipped with a third row of teeth into which a third locking means engages, the third locking means also not engaging in a tooth gap of the toothed rack simultaneously with the at least two other locking means.
- a fourth row of teeth is provided on the rack at the same height, in which a fourth locking means engages.
- the third row of teeth, and in the case of a fourth row of teeth also the fourth row of teeth has an elongated tooth gap into which the respective locking means engages in the initial position of the rack.
- the drive member preferably has a third driver when a third row of teeth is formed.
- the third driver of the drive member also does not simultaneously engage with a tooth gap of the rack with the at least two other drivers of the drive member such that it pushes against a tooth of the rack when shifting in the feed direction.
- the three drivers engage alternately.
- the drive member preferably has a fourth driver.
- a particularly fine-tuned change of engagement of the locking means and / or the drivers is thus possible, and nevertheless material fatigue due to long storage is prevented.
- the at least two locking means engage in the at least two rows of teeth on the rack, while two drivers of the drive member engage in two other rows of teeth on the rack.
- the associated arrangement of drivers and locking means that alternates around the rack makes it possible to shorten the length of the rack and thus the length of the device.
- the locking means and the driver can be provided at the same height with respect to the direction of displacement. An alternating intervention of the locking means with each other and the driver with each other is still possible.
- Fig. 1 shows an injection device with a rack with four rows of teeth
- FIG. 1 shows an injection device, in the exemplary embodiment an injection pen, in a longitudinal section.
- Figures 2 and 3 show a detail thereof in two mutually perpendicular longitudinal sections.
- the injection device has a housing with a front housing sleeve 1 and a rear housing sleeve 5 firmly connected to it.
- the front housing sleeve 1 serves as a receptacle for an ampoule 2.
- the ampoule 2 contains a liquid product in the form of an active ingredient solution, for example insulin.
- a piston 3 is accommodated in the ampoule 2. By moving the piston 3 in the feed direction towards an ampoule outlet 4, the product is displaced from the ampoule 2 through its outlet 4 and poured out by an injection needle N.
- the front housing sleeve 5 is protected by a cap K.
- the needle N is protected again by a needle cap.
- the displacement of the piston 3 in the feed direction is effected by a drive device which is accommodated in the rear housing sleeve 5.
- the drive device comprises as a driven member a toothed rack 10, which acts directly on the piston 3, and a drive member 20.
- the drive member 20 is mounted in the rear housing sleeve 5 in and against the direction of advance of the piston 3 so that it can be moved in a straight line.
- a metering element 30 designed as a sleeve body is secured against displacement with the rear housing sleeve 5, but is rotatably connected about the common longitudinal axis.
- the maximum dose path length that can be covered in the feed direction by the drive element 20 and the toothed rack 10 is set, and thus also the maximum product dose that can be dispensed during an injection.
- There is a front sleeve part 31 for this of the metering member 30 is formed in a spiral circumferential manner on its front end face, ie the front sleeve part 31 progressively drops in a circumferential direction from a foremost end face section with respect to the longitudinal axis of the injection device.
- the metering element 30 can, for example, be designed in accordance with a metering element described in WO 97/36625 and can interact with the drive element 20 during the metering as described there.
- the metering takes place in a foremost position in relation to the feed direction of the drive member 20, in which a collar or cam 26 protruding radially from the outer circumferential surface of the drive member 20 bears against a stop formed by the rear housing sleeve 5.
- the metering member 30 is rotated relative to the rear housing sleeve 5 until it has reached the desired metering position.
- a clear metering distance remains between a further collar or cam 27 which also projects from the outer lateral surface of the drive member 20 and the end face of the metering member 30 opposite this cam 27.
- the drive member 20 can be retracted relative to the rear housing sleeve 5 and thus also relative to the piston 3 against the feed direction.
- the withdrawal is carried out manually by pulling the lid 25.
- the dosing distance is equal to the dose path length in the subsequent administration.
- the toothed rack 10 When the drive member 20 is displaced or retracted, the toothed rack 10 remains in its displacement position assumed during the metering process relative to the housing. It is secured against displacement against the feed direction by locking means 6 and 8 formed on the rear housing sleeve 5.
- the locking means 6 and 8 are locking cams, which are each formed at a front end of an elastically flexible tongue and project radially inward from the tongue onto the rack 10.
- the locking means 6 and 8 each interact with a row of teeth of the rack 10 facing them, in such a way that they allow the rack 10 to be displaced in the feed direction and prevent a displacement against the feed direction by positive locking engagement.
- the rack 10 is formed by a rod body which is rectangular in cross section, which is provided with a row of saw teeth on all four sides in a front area with respect to the feed direction.
- two rows of teeth formed on opposite sides of the toothed rack 10, the locking means 6 and 8, are designated 11 and 13.
- the toothed rack 10 has two further saw tooth rows formed on opposite side surfaces of the toothed rack 10, one of which is designated by 14 in FIG.
- the individual teeth 15 of each of the rows of teeth of the rack 10 are each tapered in the feed direction; in the exemplary embodiment, the tooth flanks are simply flat and oblique.
- the back of each tooth 15 is simply flat and points perpendicular to the direction of advance and thus to the longitudinal direction of the injection device and the rack 10.
- the regular or regular tooth gaps of the rows of teeth are designated by 16.
- the four rows of teeth have the same tooth pitch. They are arranged within a tooth pitch in relation to each other in an offset with respect to the feed direction.
- the offset from row of teeth to row of teeth is entered in Figures 2 and 3 with a, b and c.
- the locking means 6 and 8 and two further locking means 7 and 9, which cooperate with the respectively facing further rows of teeth 12 and 14, are located at the same height with respect to the feed direction at 90 ° angular spacing. Because of the row offset, only one of the locking means 6 to 9 engages with a deepest tooth engagement in a tooth space 16 of the row of teeth facing it when the rack 10 is advanced.
- the three other locking means are each flanks of teeth 15 of the rows of teeth facing them, so that these other locking means are bent away from the rack 10.
- the locking means 6 to 9 successively come into the deepest possible engagement with the row of teeth facing them; there is an overall alternating engagement of the locking means.
- the locking means which is elastically fully snapped into a tooth base or towards a tooth base, locks the toothed rack 10 against displacement against the feed direction.
- the displacement of the rack 10 in the feed direction is effected by the drive member 20.
- the drive member 20 runs in the feed direction in four tongues, which at their front ends have radially inwardly projecting locking cams.
- the drivers formed in this way the two opposing drivers 21 and 23 are shown in FIG. 1.
- the drivers and the locking means are the same in their form and mode of operation. Both are formed by latching cams on resilient tongues.
- the injection device is shown in a starting position in which the rack 10 assumes its rearmost position relative to the rear housing sleeve 5 and also relative to the drive member 20.
- the rear housing half 5 is supplied completely assembled by the manufacturer with a toothed rack 10 and drive member 20 including cover 25 and metering member 30.
- the starting position thus corresponds to the storage position of the injection device, in particular the drive and metering device of the injection device.
- the injection device is a disposable pen. Reusability, i.e. an ampoule exchange, but can be achieved with simple modifications.
- the product dose to be administered with the first injection is set by the user.
- the metering member 30 is rotated into a specific rotational position which corresponds to the desired product dose.
- the cam 27 of the drive member 20 has the clear metering distance from the front end face of the metering member 30 opposite it.
- Only the locking means 6 is in the starting position on a tooth back of the row of teeth 11 on the stop.
- the other locking means 7, 8 and 9 are snapped towards the rack 10 in their relieved neutral positions, but in the starting position they come to rest in tooth gaps 17a, 17b and 17c, which are elongated compared to the regular tooth gaps 16.
- the driver 21 is in abutment with a tooth back in the starting position.
- the other mimekers 22, 23 and 24 are relieved in the neutral position in the tooth gaps facing them, ie they are not bent away in the starting position.
- the rows of teeth 12, 13 and 14 each have a tooth. These teeth, which delimit the extended tooth gaps 17a, 17b and 17c in the feed direction, only serve to test the function of the injection device.
- the rack 10 is pressed through the locking means 6 to 9 arranged concentrically to it into the starting position.
- the drive member 20 is pulled back against the feed direction by pulling the cover 25 from its foremost position with respect to the rear housing sleeve 5.
- the drive member 20 is retracted, its mimers 21 to 24 slide over the tooth rows of the rack 10 facing them, which is prevented from being carried along by the locking means 6.
- the drive member 20 and thus also the toothed rack 10 are displaced in the feed direction by pressing against the cover 25 by the dose path length.
- the rack 10 presses the piston 3 in the ampoule 2 towards the outlet 4 and product is poured out.
- the mimender 21 lies against a toothed back of the rack 10.
- the drivers of the drive member 20 are arranged behind the locking means with respect to the feed direction.
- the concentric arrangement of the locking means and the mimekers is designed such that they can be bent radially outward away from the rack 10 in accordance with the tooth shape of the tooth rows of the rack 10 against their own elastic restoring forces.
- the locking means are below each other and the drivers below each other at the same height With respect to the feed direction, while the tooth rows of the toothed racks 10 are offset from one another such that the regular tooth gaps 16 of the tooth rows come to lie at different heights with respect to the feed direction. This ensures that never more than one blocking means or one mimacher engages in one of the regular tooth gaps 16.
- the locking means and also the mimekers can be correspondingly offset at different heights with respect to the feed direction and the tooth rows of the rack 10 can be arranged at the same height.
- the arrangement chosen in the exemplary embodiment has manufacturing advantages.
- the overall length could be saved in the drive and metering device while maintaining the advantages of the alternating intervention, in that the locking means and the drivers are all arranged at the same height with respect to the feed direction.
- This can be accomplished in that two locking means, for example locking means 6 and 8, engage in two of the four rows of teeth of the rack 10 and at the same level two mimetes of the drive member 20 in the other two rows of teeth. Because of the formation of a pair of locking means and a pair of drivers, the advantage of the alternating engagement can still be retained if the rows of teeth or locking means and drivers are offset accordingly.
- the starting position shown in the figures which is also the storage position, in particular for the parts of the injection device accommodated in the rear housing sleeve 5, namely the toothed rack 10, the drive member 20 and the locking means 6 to 9, the risk of material fatigue with such locking means and Carriers exist that can not snap into tooth gaps 16 in the starting position in such a way that they are at least partially or, as in the exemplary embodiment, completely disenfranchised.
- This blocking means and mimekers would be turned in the starting position.
- the knives and locking means are elastically pre-tensioned. If this condition persists over a long period of time, elastic bending back into the functional position, namely the stop position against a tooth back, cannot be guaranteed with the required security.
- the toothed rack 10 has elongated tooth gaps where locking means and knobs engage in the starting position of the injection device, which locking means do not abut against the tooth backs of the toothed rack 10 in the starting position.
- the rack 10 is provided directly from its end face facing the piston 3 on all four sides with a row of saw teeth of the same shape and tooth pitch.
- the rows of teeth are designated 11, 12, 13 and 14 all around.
- the first row of teeth 11 has individual saw teeth 15 in succession in regular tooth pitch.
- the blocking means 6 and, viewed from the piston 3, the miminer 21 arranged behind them engage in one of the regular tooth gaps 16 in such a way that they are in abutment against the tooth back as seen in the feed direction.
- the second row of teeth 12 shown in FIG. 3 follows the first row of teeth 11. Apart from the following differences, the second row of teeth 12 is identical to the first row of teeth 11.
- the teeth 15 of the second row of teeth 12 are offset along the toothed rack 10 by a fraction of a tooth pitch, namely by the length d with respect to the teeth 15 of the first row of teeth 11 with respect to the feed direction.
- a fraction of a tooth pitch namely by the length d with respect to the teeth 15 of the first row of teeth 11 with respect to the feed direction.
- the second row of teeth 12, seen from the piston 3 has a further extended tooth gap 18a behind the extended tooth gap 17a.
- the second mimender 22 of the drive member 20 comes to rest untensioned in the starting position.
- the sequence of interventions of the knives 21 and 22 corresponds to that of the locking means 6 and 7.
- the third row of teeth 13 is provided with an extended tooth gap 17b and a further extended tooth gap 18b, in which, according to the installation position in the starting position, the third locking means 8 and the third mimender 23 in the respective neutral position, i. H. relaxed, intervene.
- the third row of teeth 13 is followed by a fourth row of teeth 14.
- a fourth row of teeth 14 Like the second row of teeth 12 and the third row of teeth 13, it has an elongated tooth gap 17c and a further elongated tooth gap 18c, into which the fourth locking means in the starting position 9 and the fourth mimehmer 24 engage with deep tooth engagement and therefore without tensioning the tongues carrying them.
- the extended tooth gaps 17a, 17b and 17c are arranged at the same height in accordance with the arrangement of the locking means 7, 8 and 9 engaging them in the starting position.
- the same applies to the further extended tooth gaps 18a, 18b and 18c, which are also related to FIG Feed direction on the rack 10 are provided at the same height.
- the elongated tooth gaps 17a and 18a are designed differently.
- the elongated tooth gap 17a is formed by omitting a tooth immediately when the rack 10 is cast or by subsequently removing an entire tooth 15.
- the further extended tooth gap 18a is formed by removing only one part or casting only part of a tooth in such a way that the tooth gap extends into the extended tooth gap 18a engaging second mimender 22 is closer to the tooth back of the second row of teeth 12 closest to the feed direction than the first mimender 21 is to the tooth back of the first row of teeth 11 closest to the feed direction.
- the tooth back which closes the extended tooth gap 18a in the second row of teeth 12 is the piston 3 closer than the tooth back, which closes the tooth gap 16 of the engagement in the first tooth row 11 in the starting position. If the drive member 20 leaves the starting position during the first metering, the second mimender 22 thus comes to a tooth back in front of the first mimender 21.
- the third row of teeth 13 is shown in detail in FIG. 2 in the region of their extended tooth gap 18b.
- the extended tooth gap 18b is formed by the fact that the middle tooth of three successive teeth projects less far from the rack than the two regular teeth 16 delimiting it.
- the middle tooth is blunted and designated 19b. It is designed in such a way that, in the starting position, the mimender 23 lies closely against a flank of the tooth 19b with little or no pre-tensioning, or preferably without pre-tensioning. In this way, in the extended tooth gap 18b on the tooth 19b formed in this way, a tooth back remains at a height of the toothed rack 10, at which a tooth back would also be located if all teeth of the row of teeth 13 were completely regular.
- the driver 23 can engage in the extended tooth gap 18b over a length L with deepest engagement.
- the further elongated tooth gaps 18a and 18c for the teeth 22 and 24 are designed similarly to the elongated tooth gap 18b, although their lengths L are shorter than that of the elongated tooth gap 18b.
- the locking means 6 to 9 protrude a little deeper into the tooth gaps 16 than the drivers 21 to 24 when they are completely snapped onto the rack 10.
- the extended tooth gaps 18a, 18b and 18c could also be formed by simply omitting a tooth, ie they could be designed like the extended tooth gaps for the locking means.
- the extended tooth gaps 17a, 17b and 17c could be formed by leaving a tooth stump, preferably in the manner of the extended tooth gaps 18a, 18b and 18c. A swapping of the training would be also possible.
- the design of the extended tooth gap shown in the exemplary embodiment for the tenants on the one hand and the locking means on the other hand is the preferred one.
- the first locking means 6 blocks the rack 10 against displacement against the feed direction.
- the product dose to be administered with the next injection is first selected with the metering element 30 FIG. 1.
- the drive member 20 is then withdrawn by the dosing distance corresponding to this dose.
- the teeth 21 to 24 slide over the teeth 15 of the respective row of teeth facing them, whereby the offset of the rows of teeth ensures that the teeth 21 to 24 snap in successively in a regular change, as a result of which several latching operations take place in relation to just a single teeth occur.
Abstract
Description
Claims
Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00900059A EP1146923B1 (de) | 1999-01-12 | 2000-01-11 | Vorrichtung zur dosierten verabreichung eines injizierbaren produktes |
JP2000593361A JP4194764B2 (ja) | 1999-01-12 | 2000-01-11 | 注射可能な薬品を複数回投与する装置 |
DE50006405T DE50006405D1 (de) | 1999-01-12 | 2000-01-11 | Vorrichtung zur dosierten verabreichung eines injizierbaren produktes |
HU0105005A HU224123B1 (hu) | 1999-01-12 | 2000-01-11 | Berendezés injektálható anyag adagolásához |
IL14412300A IL144123A0 (en) | 1999-01-12 | 2000-01-11 | Device for dosing the administration of an injectable product |
BR0007483-7A BR0007483A (pt) | 1999-01-12 | 2000-01-11 | Dispositivo para administrar um produto injetável em doses |
AT00900059T ATE266439T1 (de) | 1999-01-12 | 2000-01-11 | Vorrichtung zur dosierten verabreichung eines injizierbaren produktes |
AU18547/00A AU757363B2 (en) | 1999-01-12 | 2000-01-11 | Device for dosing the administration of an injectable product |
DK00900059T DK1146923T3 (da) | 1999-01-12 | 2000-01-11 | Indretning til afmålt afgivelse af et injicerbart produkt |
PL349598A PL196089B1 (pl) | 1999-01-12 | 2000-01-11 | Urządzenie do dawkowego podawania wstrzykiwanych produktów |
CA002356936A CA2356936C (en) | 1999-01-12 | 2000-01-11 | Device for dosing the administration of an injectable product |
KR10-2001-7008820A KR100438041B1 (ko) | 1999-01-12 | 2000-01-11 | 주사제품 투여장치 |
IL144123A IL144123A (en) | 1999-01-12 | 2001-07-03 | Dosage device for administering an injectable product |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19900827.2 | 1999-01-12 | ||
DE19900827A DE19900827C1 (de) | 1999-01-12 | 1999-01-12 | Vorrichtung zur dosierten Verabreichung eines injizierbaren Produkts |
Publications (1)
Publication Number | Publication Date |
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WO2000041752A1 true WO2000041752A1 (de) | 2000-07-20 |
Family
ID=7894016
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2000/000016 WO2000041752A1 (de) | 1999-01-12 | 2000-01-11 | Vorrichtung zur dosierten verabreichung eines injizierbaren produktes |
Country Status (19)
Country | Link |
---|---|
US (1) | US6613023B2 (de) |
EP (1) | EP1146923B1 (de) |
JP (1) | JP4194764B2 (de) |
KR (1) | KR100438041B1 (de) |
CN (1) | CN1177624C (de) |
AT (1) | ATE266439T1 (de) |
AU (1) | AU757363B2 (de) |
BR (1) | BR0007483A (de) |
CA (1) | CA2356936C (de) |
CZ (1) | CZ295394B6 (de) |
DE (2) | DE19900827C1 (de) |
DK (1) | DK1146923T3 (de) |
ES (1) | ES2221611T3 (de) |
HU (1) | HU224123B1 (de) |
IL (2) | IL144123A0 (de) |
PL (1) | PL196089B1 (de) |
PT (1) | PT1146923E (de) |
RU (1) | RU2212253C2 (de) |
WO (1) | WO2000041752A1 (de) |
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GB9418122D0 (en) * | 1994-09-08 | 1994-10-26 | Owen Mumford Ltd | Improvements relating to injection devices |
US5549558A (en) | 1995-06-09 | 1996-08-27 | Martin; Robin P. | Self sheathing safety needle |
JP4472026B2 (ja) | 1996-02-23 | 2010-06-02 | ノボ ノルディスク アクティーゼルスカブ | パラメーターの電子的表現を持つ注射器 |
AU713846B2 (en) | 1996-07-01 | 1999-12-09 | Pharmacia & Upjohn Ab | Injection device and method for its operation |
DE29703820U1 (de) * | 1997-03-03 | 1998-07-02 | Medico Dev Investment Co | Injektionsgerät |
DE19900792C1 (de) | 1999-01-12 | 2000-06-15 | Disetronic Licensing Ag | Vorrichtung zur Verabreichung eines injizierbaren Produkts |
-
1999
- 1999-01-12 DE DE19900827A patent/DE19900827C1/de not_active Expired - Fee Related
-
2000
- 2000-01-11 PL PL349598A patent/PL196089B1/pl not_active IP Right Cessation
- 2000-01-11 BR BR0007483-7A patent/BR0007483A/pt not_active IP Right Cessation
- 2000-01-11 CA CA002356936A patent/CA2356936C/en not_active Expired - Fee Related
- 2000-01-11 AT AT00900059T patent/ATE266439T1/de active
- 2000-01-11 RU RU2001122581/14A patent/RU2212253C2/ru not_active IP Right Cessation
- 2000-01-11 DK DK00900059T patent/DK1146923T3/da active
- 2000-01-11 AU AU18547/00A patent/AU757363B2/en not_active Ceased
- 2000-01-11 ES ES00900059T patent/ES2221611T3/es not_active Expired - Lifetime
- 2000-01-11 DE DE50006405T patent/DE50006405D1/de not_active Expired - Lifetime
- 2000-01-11 CZ CZ20012512A patent/CZ295394B6/cs not_active IP Right Cessation
- 2000-01-11 JP JP2000593361A patent/JP4194764B2/ja not_active Expired - Fee Related
- 2000-01-11 IL IL14412300A patent/IL144123A0/xx active IP Right Grant
- 2000-01-11 KR KR10-2001-7008820A patent/KR100438041B1/ko not_active IP Right Cessation
- 2000-01-11 HU HU0105005A patent/HU224123B1/hu not_active IP Right Cessation
- 2000-01-11 CN CNB008027420A patent/CN1177624C/zh not_active Expired - Fee Related
- 2000-01-11 WO PCT/CH2000/000016 patent/WO2000041752A1/de active IP Right Grant
- 2000-01-11 PT PT00900059T patent/PT1146923E/pt unknown
- 2000-01-11 EP EP00900059A patent/EP1146923B1/de not_active Expired - Lifetime
-
2001
- 2001-07-03 IL IL144123A patent/IL144123A/en not_active IP Right Cessation
- 2001-07-11 US US09/903,297 patent/US6613023B2/en not_active Expired - Fee Related
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FR2612782A1 (fr) * | 1987-03-23 | 1988-09-30 | Taddei Andre | Seringue d'injection a systeme de dosage |
US5807346A (en) * | 1993-02-08 | 1998-09-15 | Laboratoire Aguettant | Metering instrument, particularly for injecting medicinal liquid |
US5643214A (en) * | 1993-05-18 | 1997-07-01 | Owen Mumford Limited | Injection devices |
US5328476A (en) * | 1993-08-23 | 1994-07-12 | Bidwell James K | One-time use hypodermic syringe apparatus and operation thereof |
WO1997036626A1 (de) * | 1996-04-02 | 1997-10-09 | Disetronic Licensing Ag | Injektionsgerät |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003008023A1 (en) * | 2001-07-16 | 2003-01-30 | Eli Lilly And Company | Medication dispensing apparatus configured for rotate to prime and pull/push to inject functionality |
AU2002345785B2 (en) * | 2001-07-16 | 2007-11-15 | Eli Lilly And Company | Medication dispensing apparatus configured for rotate to prime and pull/push to inject functionality |
US7704237B2 (en) | 2001-07-16 | 2010-04-27 | Eli Lilly And Company | Medication dispensing apparatus configured for rotate to prime and pull/push to inject functionality |
DE102004060145A1 (de) * | 2004-12-14 | 2006-07-06 | Tecpharma Licensing Ag | Zahneingriffsteuerung |
DE102004060145B4 (de) * | 2004-12-14 | 2016-07-14 | Tecpharma Licensing Ag | Zahneingriffsteuerung |
DE102005008065A1 (de) * | 2005-02-22 | 2006-08-24 | Tecpharma Licensing Ag | Zahneingriff mit ungleicher Teilung |
US8734403B2 (en) | 2006-08-14 | 2014-05-27 | Tecpharma Licensing Ag | Blocking element for a dosing mechanism |
US8246577B2 (en) | 2006-08-14 | 2012-08-21 | Tecpharma Licensing Ag | Injection device with claw-type lock |
US8679071B2 (en) | 2006-08-14 | 2014-03-25 | Tecpharma Licensing Ag | Injection device comprising a mechanical lock |
US9022994B2 (en) | 2006-08-14 | 2015-05-05 | TeePharma Licensing AG | Injection device with a variable thread guide |
WO2008019517A1 (de) * | 2006-08-14 | 2008-02-21 | Tecpharma Licensing Ag | Injektionsvorrichtung mit klauensicherung |
WO2011003979A1 (en) * | 2009-07-08 | 2011-01-13 | Novo Nordisk A/S | Frost protected injection device |
US9616175B2 (en) | 2009-07-08 | 2017-04-11 | Novo Nordisk A/S | Frost protected injection device |
Also Published As
Publication number | Publication date |
---|---|
KR20010101489A (ko) | 2001-11-14 |
CN1336832A (zh) | 2002-02-20 |
CA2356936A1 (en) | 2000-07-20 |
PL196089B1 (pl) | 2007-12-31 |
US20010051792A1 (en) | 2001-12-13 |
JP4194764B2 (ja) | 2008-12-10 |
ATE266439T1 (de) | 2004-05-15 |
CA2356936C (en) | 2006-04-11 |
AU1854700A (en) | 2000-08-01 |
US6613023B2 (en) | 2003-09-02 |
EP1146923A1 (de) | 2001-10-24 |
HUP0105005A3 (en) | 2003-12-29 |
CZ295394B6 (cs) | 2005-07-13 |
EP1146923B1 (de) | 2004-05-12 |
BR0007483A (pt) | 2002-01-22 |
JP2002534228A (ja) | 2002-10-15 |
IL144123A0 (en) | 2002-05-23 |
CZ20012512A3 (cs) | 2001-10-17 |
KR100438041B1 (ko) | 2004-06-30 |
DE19900827C1 (de) | 2000-08-17 |
ES2221611T3 (es) | 2005-01-01 |
RU2212253C2 (ru) | 2003-09-20 |
PT1146923E (pt) | 2004-10-29 |
DK1146923T3 (da) | 2004-08-02 |
IL144123A (en) | 2007-02-11 |
CN1177624C (zh) | 2004-12-01 |
HUP0105005A2 (hu) | 2002-04-29 |
AU757363B2 (en) | 2003-02-20 |
HU224123B1 (hu) | 2005-05-30 |
DE50006405D1 (de) | 2004-06-17 |
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